All revision numbers and dates shall be removed from pages.

A. The numbering of paragraphs and subparagraphs within a section is not required.

B. No numbers of paragraphs and subparagraphs is required in a section.

C. The numeral order of the paragraphs and subparagraphs is unnecessary in a section.

A. If the repair scheme must be changed, the approval of the design authority is hardly got.

B. If the design authority need change the repair scheme, it can get the approval.

C. If it is necessary to change the repair scheme, get the approval of the design authority.

A. 生产商编写的维修手册必须参考本规范中包含的所有材料的格式、字体和展示方法。

B. 本手册中包含的规范可以指导厂家编写维修手册，包括所有规章书写格式和展示方法。

C. 本规范中包含的规则应作为制造商编写的维修手册中包含的所有材料的格式、样式和展示方法的指南。

A. A mixture of fuel and oxygen can cause an explosion.

B. Fuel and oxygen react with each other to cause explosion.

C. A mixture of fluid and oxygen can be set on fire.

A. If you use folding page, the page number must be invisible when folding.

B. The page number must be viewing if you fold the page.

C. If folded pages are used, the page number must be visible when folded.

A. 在开始检查前，你应该拆除接近门和整流罩。

B. 在开始检查前，你应该拆除登机门和整流罩。

C. 在开始检查前，你应该拆除舱门和组件。

A. The manufacturer may choose to include information on Unscheduled Maintenance Checks, including Time Limits/Inspections and Maintenance Checks, in a separate manual. Reference points must be listed in the maintenance manual.

B. For Unscheduled Maintenance Checks, the manufacturer will have the choice to separate the information of Time Limits/Inspections and Maintenance Checks in manuals. The manual can be the Maintenance Manual.

C. The information on Unscheduled Maintenance Checks should be provided in the Maintenance Manual including Time Limits/Inspections and Maintenance Checks. Whether to include these information in an other manual is at the manufacturer＇s option.

A. 参考修订FAR21.50的格式，应保持与使用的规范一致。

B. 修订应以FAR 21.50规定为基础，与其规范的格式一致。

C. 修订FAR 21.50规章的格式，应参考使用修订规范的格式要求。

A. Use white paper with good strength characteristics and enough weight and substance to eliminate excessive print leakage when printing on both sides.

B. Use good white paper with high strength quality and of adequate weight to delete excessive show-through when printed on both sides.

C. Use white paper with good strength and of sufficient weight and substance to prevent overmuch ink show-through the paper when printed on both sides.

A. 在铝合金部件上不要使用藏红花布，它含有氧化铁，在铝合金部件上会造成划痕。

B. 在铝质部件上不要使用细砂布，细砂布含有氧化铁，在铝质部件上会造成腐蚀。

C. 在铝合金部件上不要使用细砂布，细砂布含有氧化铁，在铝合金部件上会造成腐蚀。